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(No Model.) 2 Sheets-Sheet 1. W. 1. B. MOHALE. A

A TUBE EXPANDER AND GUTTER.

No. 353,425. Patented Nov. 30, 1886.

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2 Sheets-Sheet 2. W. I. B. MGHALE.

TUBE BXPANDER AND GUTTER.

' Patented Nov. 30, 1886.

W/TNESSES: gmm

ATTORNEYS- UNITED STATES PATENT OFFICE.

WILLIAM I. MOHALE, OFNEV YORK, N. Y.

TUBE EXPANDER AND CUTTER.

SPECIFICATION forming part of Letters Patent No. 353,425, datedrNovember30, 1886.

Application filed March 18, 15556.

To all whom it may concern:

Be it known that I, WILLIAM I. B. McI-IALE, of the city, county, andState of New York, have invented certain new and useful Improvements inCombined Tube Expander and Cutter, of which the following is aspecification.

This invention relates to certain new and useful improvements in thatclass of implements used for the purpose of expanding the ends of tubes.f

The object of my invention is to provide a tube-expander with anattachment for expanding the tubes and cutting them at the outside atthe same time, or for cutting them at the inside of the boiler-head.

The invention consists in the combination, with a slotted stock, ofboxes in the slots of the stock, swagcs or rollers in the boxes, anddetachable cutters on the outer rollers in the boxes.

The invention also consists in various details and combinations of thesame-as will be described and set forth hereinafter, and pointed out inthe claims.

In the accompanying drawings, Figure l is a side view of my improvedtube expander and cutter, parts being broken out. Fig. 2 is acrosssectional view of the same on the line :v fr, Fig. 3. Fig. 3 is asectional plan View of the same on the line y y, Fig. 2. Fig. 4 is aside view of the same, showing it adj usted for cutting the tubes at theinside of the boilerhead. Fig. 5 is a sectional plan view of the same onthe line z z, Fig. 4. Fig. 6 is a detail cross-sectional view of one ofthe boxes. Fig. 7 is a partial side and sectional view of a modifiedconstruction of one of the cutters.

Similar letters of reference indicate corresponding parts.

rIlhe tubular stock A is provided at about the middle of its length withau external annular offset or shoulder, B, separating the parts A and A2of the stock, the part A having a slightly greater diameter than thepart A2. The part A is provided with three or more longitudinal slots,C, which extend from the bore of the stock to the outer surface, and areslightly narrowed from the outer to the inner surface yof the stock, andthe sides of the slots are slightly curved toward each other. In saidslots C the cylindrical swages D or the boxes E, which will be describedhereinafter, are placed. The stock is passed into a ring,

F, having an annular flange, F', and an annu- Serial No. 195.640. (Nomodel.)

lar rabbet, F2, into which the lower part of the larger cylindrical partA can pass. A ring, G, surrounding the part A2 of the stock, is placedagainst the bottom of the ring F and is held in place by a pin or key,G. If desired, the ring F may have two lugs, H, projecting in thedirection toward the upper or free end of the part A.

The cylindrical rollers or swages Dare ofthe same length as the slots C,so as to have :no longitudinal play in the same, and are so shaped as torevolve freely in the slots. The diameters of the swages or rollers aresuch that the rollers can be inserted into the slots from the outside,but cannot pass entirely through the same, as the diameter of the swagesis greater than the inner width ot' the slots.

Each box E is provided with a longitudinal groove, K, in the inner ornarrower sidesaid groove having approximately the cross-section 0f aboutthree-quarters ofa circle. From said groove K a longitudinal slot, L,extends to the wider side of the box, the sides of said slot L beingcurved. The outer or wider side of each box is curved on a convex line,and the inner side on a concave line, 4as shown in dotted lines in Figs.5 and 6.

The box E is closed at one end and open at the other end to permitpassing the rollers into vthe slots and grooves. 'ln theouter convexsurface of each box two transverse slots, M and N, are provided, one atone end and the other at the middle, said slots extending through to thelongitudinal groove K. In the groove K I place a roller, O,whi'cl1 isprovided with two annularl grooves, P and Q, so located that when aroller is placed in the box thegrooves will be in line with thetransverse slots M and N. In the slot L, I place a roller, R, which ispassed through a circular cutter, S, in one of the grooves M and N, thusadapting said cutter to revolve on said roller It, the roller R restingon the surface of the roller O. The cutter S is made V-shaped incross-section,or may consist of a short cylinder provided with aV-shaped cutting-edge, as shown in Fig. 7. The grooves P and Q may beV-shaped or may be shaped the same as the contour of the cutter shown inFig. 7. The sides of the box E are slightly curved and inclined towardeac-h other. A flange, WV, is formed on the open end of each box tobridge over the slot L.

The operation is as follows: When a tube IOO is to be expanded and cutoff outside of the boiler-head, a box, E, is placed in each slot of thestock, and the ring F, having the lugs H, is fastened on the stock. rlhepart A or" the stock is inserted into the tube until the ends of thelugs H rest against the boiler-head, (shown in dotted lines in Fig. 1,)and amandrel is then driven through the stock, and, pressing. on therollers O, presses them outwardly, whereby the boxes are also pressedoutwardand the rollers R pressed against the inside of the tube. Byturning the mandrel the rollers O are revolved on theirlongitudinalaxis, and they in turn revolve the rollers It. The stock A is alsoturned on its longitudinal axis, and thus the cutters are carried in acircle along the inside of the tube. As the edges of the cutter projectmore than the surfaces of the4 rollers It, the cutters rst act on theinside of the tube and cut a groove in the same, which is graduallydeepened until the projecting end of the tube outside of the boiler-headis cut oft". Then the rollers R begin to act on the tube andexpand thesame. In case the device is to be used as an ordinary tube-expanderwithout cutting the tube, the swages D are inserted into the slots. Incase it is desired to cut off the tubes inside the boilerhead, twocylindrical rollers or swages, D, are placed in two ofthe slots, and abox, E, in the third. The cutter S of the box E is placed in the forwardgroove, M. The stock is passed into the tube, the part A2 being shown inFig. 4 in position in the tube,which,with the head, is shown in dottedlines, the iiange F of the ring F resting against the outer side of theboiler-head. The mandrel is inserted and turned on its longitudinalaxis, whereby the rollers O and R are revolved, and the stock isrevolved on its longitudinal axis. The critter S acts on the tube insideof the boi-ler-head and cuts a groove into the same, which is graduallydeepened, and, finally, the tube is cut off and drops to thel bottom ofthe boiler.

If desired, all three boxes may be used for cutting cti' the tube at theinside of the boilerhead; but I prefer to use two swages and one box, asthe friction-surface is increased and the stock may be revolved on itslongitudinal axis more easily. The ring F, provided with or without thelugs H, can easily be removed from the stock and `readily replaced. Theiiange F limits the outward movement of the swages or boxes and preventsmoving the said parts outward sufficiently to remove them from theirslots. The swages or boxes can only be removed after the ringsF and Ghave been removed. Y

Having thus described myinvention, Iclaim as new and desire to secure byLetters Patent- 1. In a tube expander and cutter, the combination, witha stock Ahaving longitudinal slots, of boxes in said slots, rollersmounted in the boxes, and cutters mounted detachably on said rollers,substantially as herein shown and described.

2. In a tube expander and cutter, the combination, with a stock havingslots, of boxes in said slots, two parallel longitudinal rollers in eachbox, and a cutter on one roller on each pair of rollers, substantiallyas shown and described.

3. In a tube expander and cutter, the combination, with a stock havingslots, of boxes in said slots, two longitudinal parallel rollers in eachbox, and a cutter mounted loosely on theouter roller, substantially asshown and described.

4. In a tube expander and cutter, the combination, with a stock havingslots, of boxes in the slots and two longitudinal parallel rollers ineach box, substantially as shown and described.I

5. In a tube expander and cutter, the combination, with a stock havingslots, of a box in each slot, two longitudinal parallel rollers in eachbox, one roller project-ing from the inner surface of the box and theother from the outer surface, and said rollers being in contact,substantially as shown and described.

6. In a tube expander and cutter, with a stock having slots, of boxes inthe slots, two parallel longitudinal rollers in each box, one

.roller projecting from the inner and the other from the outer surfaceof the box, the inner rollers having annular grooves and the outerrollers carrying cutters, substantially as shown and described. A

7. In a tube expander and cutter, the combination, with a stock havingslots, of boxes in the slots, each box having a longitudinal groove andslotand two transverse slots, and of a cutter mounted on the outerroller within one of the transverse slots, substantially as shown anddescribed.

8. In a tube expander and cutter, the corn- IOO bination, with a stockhaving slots, of pairs f of rollers in the slots of the stock, saidrollers being mounted to travel transversely to their.

longitudinal axis toward and from the center of the stock, and saidrollers being in contact,

and of cutters on the outer rollers, substantially as shown anddescribed.

9. In a tube expander and cutter, the combination, with the stock havinglongitudinal slots, of boxes in the slots, each box havinglongitudinalgrooves and slots, rollers in the boxes, and the bridging-flanges W atthe ends of the boxes, substantially as shown and described.

l0. In a tube expander and cutter, the combination, with the stock A,having the 1ongitudinal slots E, of the rings F, having the lugs H andthe rabbet, the lower ends of the slots E being flush with the uppersurface ot' the ring F, substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing witnesses.-

VILLIAM I. B. MCHALE.

Witnesses:

OsoAR F. GUNZ, SIDNEY MANN.

IIO

